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Windows Server® 2008 TCP/IP Protocols and Services by Joseph Davies

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When packet-switching networks were first introduced, they were based on existing analog copper lines that experienced a high number of errors. The X.25 packet-switched technology was designed to compensate for these errors and provide connection-oriented reliable data transfer. In these days of high-grade digital fiber-optic lines, there is no need for the overhead associated with X.25. Frame Relay is a packet-switched technology similar to X.25, but without the added framing and processing overhead to provide guaranteed data transfer. Unlike X.25, Frame Relay does not provide link-to-link reliability. If a frame in the Frame Relay network is corrupted in any way, it is silently discarded. Upper layer communication protocols such ...

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